. >> through at least 20 debates in the course of the primaries and gingrich himself just the other day said that he is the best debater. . republican said they think is he a great debater. >> reporter: romney used rob port man to act as his opponent while preparing for the debates and kerry played the role of romney's stand in. >> the president has a day job. he has been president and has not had the time to practice. all we hear about is how much romney is practicing, practicing, practicing. i think people should expect romney to come in very prepared, he will -- he will do very well because he has done well in all the debates. >> i think sometimes we expect a major breakthrough, you know -- the comment that doesn't happen very often. happened with regan, happened with regan and carter. i can't remember the last time there was one of these comments that grabbed everybody's attention because the candidates to well prepared. they are well scripted. >> reporter: on sunday the president headed to las vegas for a campaign event while romney went to church in massachusetts. ktvu channel 2ne